Which of the following does the scientific method utilize?
A)
developing a scientific law
B)
forming a hypothesis
C)
testing the hypothesis
D)
a & b
E)
b & c
F)
none of the above
2.
Which of the following is a physical property?
A)
Rusting
B)
Corrosion
C)
Density
D)
Color change
3.
The number 30,000 has how many significant figures?
A)
unlimited
B)
1
C)
3
D)
5
4.
The number 15.0 has how many significant figures?
A)
2
B)
3
C)
1
D)
4
5.
How many significant figures does the number 53.120 have?
A)
3
B)
4
C)
5
D)
6
6.
How many significant figures should the answer to this question have: 14.1 + 1.079 =
A)
2
B)
3
C)
4
D)
5
7.
Using the correct number of significant figures, the answer to 20 ´ 23.4119 is
A)
468.238
B)
468.2380
C)
470
D)
500
8.
Which of the following represent three measurements that are the least precise?
A)
2.34, 2.40, and 2.37
B)
14.2, 14.1, and 14.3
C)
3.45, 45.3, and 13.1
D)
35.2, 35.5, and 35.4
9.
If a sample has a mass of 2.370 g, which of the following readings is most accurate?
A)
2.330 g
B)
2.368 g
C)
2.450 g
D)
2.373 g
10. Ice melting is a A) chemical change B) physical change C) both D) neither
11.
A battery corroding is a A) chemical change B) physical change C) both D) neither
12. The steam coming from the road on a hot day after a rain storm is A) chemical change B) physical change C) both D) neither 13. A student, not following lab rules, is playing with the striker in lab and catches his lab paper on fire. This is a A) chemical change B) physical change C) both D) neither 14. A milliliter is equal to a A) cm3 B) m3 C) L3 D) none of the above 15. A conversion factor is A) equal to 1 B) exactly the same on the top and bottom of the fraction C) a way of changing between base units D) none of the above Short answer/essay: completely answer each question.
16.
List 3 characteristics that allow an investigator to know what is relevant data.
17.
When a gun is fired, gunpowder makes carbon dioxide, water vapor, nitrogen gas, and carbon monoxide which eject the bullet from the barrel. Is the firing of a gun, a chemical or physical property?
18. In the case study, why couldn't Pitera claim that the soil samples on the shovel were from his yard? 19. How can estimating the last digit on a measurement provide you with a more accurate value? 20. Explain how the scientific method is used to solve problems and why so many different professions use the scientific method Problems: Show all work in solving the following. Be sure to use significant figures and units of measure in all answers. Circle your final answer.
21.
How many gitz would you have if you start with 1.02 x 103 futz? 1 futz = 50 wells, 20 gitz = 0.5 bits, 14 bits = 10 mots, and 1 well= 23 mots.
22.
a. How many micrograms are there in 24.52 g? b. Most states are adopting a blood alcohol content (BAC) of 0.08 g/dL as the legal limit. What would the BAC be in g/mL? .
23.
Show all work: a. 9.2 kg = cg b. 5.0x103 μL = dL c. 345.67 kg/day = ___ mg/s
24. What is the mass of a metal with a density of 19.980 g/mL and a volume of 4.15 mL?
25. A student runs a lab and collects the following data. The student used water displacement and always started with 10.0 mL of water. The student knows that his metal is either aluminum which has a density of 2.70g/mL, brass which has density of 8.44 g/mL, lead which has a density of 11.34 g/mL, or zinc which has a density of 7.04 g/mL. mass volume water + metal trial 1 48.5 g 15.8 mL trial 2 15.6 g 11.8 mL trial 3 54.2g 17.1 mL trial 4 27.5g 13.5mL Graph the data as mass vs volume, draw a best fit line and based on the graph identify the metal explaining your answer.
Chapter 1
Multiple choice: choose the best answer
Circle the false statement. When working on a lab, you should
a) Always ask if you are unsure about a step b) Get started immediately c) Wait until Mrs Shirley gives any final directions and tells you to start d) Have on your apron and goggles before getting the necessary materials from Mrs. Shirley.
2. Elements that react with each other form a. isotopes b. decay products c. mixtures d. compounds
3. Which of the following atomic symbols represent the coinage metals, copper, silver, and gold? a. Co, Ag, and Au b. Cu, Ag, and Ga c. Cu, Ag, and Au d. C, Ag, and Au
4. Which series of elements are nonmetals?
a. tungsten, silicon, and chlorine
b. tungsten, sulfur, and silver
c. germanium, arsenic, and sulfur
d. Neon, fluorine, and carbon
5. Which of the following is considered matter?
a. a plant
b. tungsten
c. copper
d. all of the above
6. In lab, if you want to accurately measure a liquid, you should use a(n) a. Beaker b. Graduated cylinder c. Erlenmeyer flask d. Test tube
7. What are two of the properties of metalloids? a. They conduct both heat and electricity but not very well. b. They somewhat conduct heat but not electricity. c. They conduct neither heat nor electricity. d. They conduct a little electricity but not heat.
8. Which of the following would be used to separate a mixture? a. chromatography b. evaporation c. distillation d. all of the above
9. What is the formula for sodium phosphate which has 3 sodium, 1 phosphorous, and 3 oxygen atoms? a. S3PO3 b. Na3PO3 c. NaP3O3 d. SP3O3
10. An oil and vinegar salad dressing with herbs is a. A compound b. A homogeneous mixture c. A heterogeneous mixture d. An element
11. The symbol for the element platinum is a. P b. Pl c. Pt d. Pn
12. The symbol for the first element in group 16 is a. O b. N c. F d. S
13. Distillation is used to separate _ based on _ a. Compounds, freezing points b. Mixtures, boiling points c. Compounds, boiling points d. Mixtures, freezing points
14. Matter a. Has mass b. Takes up space c. Has mass and takes up space d. Has mass, takes up space and makes up only the metals
15. A pure substance is a. A compound b. An element c. A mixture d. A compound or an element
16. Which of the following is a metal? a. Al b. Si c. Te d. Xe
17. Which of the following represents the states of matter from least energy to most energy? a. Gas, liquid, solid b. Liquid, gas, solid c. Solid, liquid, gas d. Solid, gas, liquid
18. W is the symbol for a. Tungsten b. Water c. Mercury d. Tantalum
19. Tin has the symbol a. T b. St c. Tn d. Sn
20. You need to fill a beaker with water. What do you do first? a. Turn the water on and immediately put the beaker under the flow b. Put the beaker under the faucet and then turn on the water c. Turn the water on, adjust the flow to a low level, and then put the beaker under the water d. It really doesn’t matter what you do first
21. Which of the following is an element? a. copper b. nitrogen dioxide c. brass d. air
22. Glucose, C6H12O6, is a(n) a. Element b. Compound c. Homogeneous mixture d. Heterogeneous mixture
23. Salt water is a(n) a. Element b. Compound c. Homogeneous mixture d. Heterogeneous mixture
24. Which of the following have constant or set shape a. Solid b. Liquid c. Gas d. A and B e. A and C
25. A beaker a. Is the same size top to bottom b. Is used to hold liquids c. Changes color when heated d. A and B e. All of the above
26. An Erlenmeyer Flask is a. Wide at the bottom and narrow at the top b. Is the same size top to bottom c. Is used for swirling liquids d. A and C e. All of the above
27. Alchemy a. Is the science concerned with changing metal into gold b. Is the science concerned with changing plants to gold c. Is the science concerned with changing copper to silver d. Is the science concerned with changing wood to silver
28. The first woman chemist was a. Menton b. Cleopatra c. Moseley d. Curie
29. Forensics uses _ science disciplines and _ is the core science a. A few, physiology b. Most, biology c. All, chemistry d. All, physics
30. The smallest unit of a molecular compound is a. An atom b. An element c. A molecule d. A compound
Short answer/essay: thoroughly answer each question, using complete sentences where appropriate. Don’t forget to answer all parts.
31. Discuss the case study and explain how it relates to this unit.
32. Define matter and discuss the two types of matter.
33. Describe two different ways to separate a homogeneous mixture.
34. List 5 lab safety rules.
35. Discuss the periodic table. Include Mendeleev, Moseley, periods, groups, metals, metalloids, and nonmetals.
36. During your experiment you accidently mix alcohol which has a boiling point of 62oC with water. You need pure alcohol and there is no more in the supply cabinet. How would you separate the alcohol and the water?
37. Wind is not matter. Can you experience wind without matter? Why or why not?
38. Write the formula for dinitrogen pentaoxide if there are 2 nitrogen atoms and 5 oxygen atoms.
39. What is the least abundant type of elements on the periodic table?
40. Based on the following information, predict the unknown element and its missing characteristics.
Fall ReviewsChapter 2
Multiple Choice: circle the best answer:A) chemical change
B) physical change
C) both
D) neither
A) chemical change
B) physical change
C) both
D) neither
A) chemical change
B) physical change
C) both
D) neither
13. A student, not following lab rules, is playing with the striker in lab and catches his lab paper on fire. This is a
A) chemical change
B) physical change
C) both
D) neither
14. A milliliter is equal to a
A) cm3
B) m3
C) L3
D) none of the above
15. A conversion factor is
A) equal to 1
B) exactly the same on the top and bottom of the fraction
C) a way of changing between base units
D) none of the above
Short answer/essay: completely answer each question.
18. In the case study, why couldn't Pitera claim that the soil samples on the shovel were from his yard?
19. How can estimating the last digit on a measurement provide you with a more accurate value?
20. Explain how the scientific method is used to solve problems and why so many different professions use the scientific method
Problems: Show all work in solving the following. Be sure to use significant figures and units of measure in all answers. Circle your final answer.
20 gitz = 0.5 bits, 14 bits = 10 mots, and 1 well= 23 mots.
b. Most states are adopting a blood alcohol content (BAC) of 0.08 g/dL as the legal limit. What would the BAC be in g/mL?
.
a. 9.2 kg = cg
b. 5.0x103 μL = dL
c. 345.67 kg/day = ___ mg/s
24. What is the mass of a metal with a density of 19.980 g/mL and a volume of 4.15 mL?
mass volume water + metal
trial 1 48.5 g 15.8 mL
trial 2 15.6 g 11.8 mL
trial 3 54.2g 17.1 mL
trial 4 27.5g 13.5mL
Graph the data as mass vs volume, draw a best fit line and based on the graph identify the metal explaining your answer.
Chapter 1
Multiple choice: choose the best answer- Circle the false statement. When working on a lab, you should
a) Always ask if you are unsure about a stepb) Get started immediately
c) Wait until Mrs Shirley gives any final directions and tells you to start
d) Have on your apron and goggles before getting the necessary materials from Mrs. Shirley.
2. Elements that react with each other form
a. isotopes
b. decay products
c. mixtures
d. compounds
3. Which of the following atomic symbols represent the coinage metals, copper, silver, and gold?
a. Co, Ag, and Au
b. Cu, Ag, and Ga
c. Cu, Ag, and Au
d. C, Ag, and Au
4. Which series of elements are nonmetals?
5. Which of the following is considered matter?
6. In lab, if you want to accurately measure a liquid, you should use a(n)
a. Beaker
b. Graduated cylinder
c. Erlenmeyer flask
d. Test tube
a. They conduct both heat and electricity but not very well.
b. They somewhat conduct heat but not electricity.
c. They conduct neither heat nor electricity.
d. They conduct a little electricity but not heat.
8. Which of the following would be used to separate a mixture?
a. chromatography
b. evaporation
c. distillation
d. all of the above
9. What is the formula for sodium phosphate which has 3 sodium, 1 phosphorous, and 3 oxygen atoms?
a. S3PO3
b. Na3PO3
c. NaP3O3
d. SP3O3
10. An oil and vinegar salad dressing with herbs is
a. A compound
b. A homogeneous mixture
c. A heterogeneous mixture
d. An element
11. The symbol for the element platinum is
a. P
b. Pl
c. Pt
d. Pn
12. The symbol for the first element in group 16 is
a. O
b. N
c. F
d. S
13. Distillation is used to separate _ based on _
a. Compounds, freezing points
b. Mixtures, boiling points
c. Compounds, boiling points
d. Mixtures, freezing points
14. Matter
a. Has mass
b. Takes up space
c. Has mass and takes up space
d. Has mass, takes up space and makes up only the metals
15. A pure substance is
a. A compound
b. An element
c. A mixture
d. A compound or an element
16. Which of the following is a metal?
a. Al
b. Si
c. Te
d. Xe
17. Which of the following represents the states of matter from least energy to most energy?
a. Gas, liquid, solid
b. Liquid, gas, solid
c. Solid, liquid, gas
d. Solid, gas, liquid
18. W is the symbol for
a. Tungsten
b. Water
c. Mercury
d. Tantalum
19. Tin has the symbol
a. T
b. St
c. Tn
d. Sn
20. You need to fill a beaker with water. What do you do first?
a. Turn the water on and immediately put the beaker under the flow
b. Put the beaker under the faucet and then turn on the water
c. Turn the water on, adjust the flow to a low level, and then put the beaker under the water
d. It really doesn’t matter what you do first
21. Which of the following is an element?
a. copper
b. nitrogen dioxide
c. brass
d. air
22. Glucose, C6H12O6, is a(n)
a. Element
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
23. Salt water is a(n)
a. Element
b. Compound
c. Homogeneous mixture
d. Heterogeneous mixture
24. Which of the following have constant or set shape
a. Solid
b. Liquid
c. Gas
d. A and B
e. A and C
25. A beaker
a. Is the same size top to bottom
b. Is used to hold liquids
c. Changes color when heated
d. A and B
e. All of the above
26. An Erlenmeyer Flask is
a. Wide at the bottom and narrow at the top
b. Is the same size top to bottom
c. Is used for swirling liquids
d. A and C
e. All of the above
27. Alchemy
a. Is the science concerned with changing metal into gold
b. Is the science concerned with changing plants to gold
c. Is the science concerned with changing copper to silver
d. Is the science concerned with changing wood to silver
28. The first woman chemist was
a. Menton
b. Cleopatra
c. Moseley
d. Curie
29. Forensics uses _ science disciplines and _ is the core science
a. A few, physiology
b. Most, biology
c. All, chemistry
d. All, physics
30. The smallest unit of a molecular compound is
a. An atom
b. An element
c. A molecule
d. A compound
Short answer/essay: thoroughly answer each question, using complete sentences where appropriate. Don’t forget to answer all parts.
31. Discuss the case study and explain how it relates to this unit.
32. Define matter and discuss the two types of matter.
33. Describe two different ways to separate a homogeneous mixture.
34. List 5 lab safety rules.
35. Discuss the periodic table. Include Mendeleev, Moseley, periods, groups, metals, metalloids, and nonmetals.
36. During your experiment you accidently mix alcohol which has a boiling point of 62oC with water. You need pure alcohol and there is no more in the supply cabinet. How would you separate the alcohol and the water?
37. Wind is not matter. Can you experience wind without matter? Why or why not?
38. Write the formula for dinitrogen pentaoxide if there are 2 nitrogen atoms and 5 oxygen atoms.
39. What is the least abundant type of elements on the periodic table?
40. Based on the following information, predict the unknown element and its missing characteristics.
A. Element:…………..Mg C. Element:…………..
Physical state:……..solid Physical state:…….._
Density:……………1.74 g/cm3 Density:……………g/cm3
Melting Point:……...651oC Melting Point:……...oC
Reactivity:………….some Reactivity:………….
Color:………………silvery white Color:………………__
B. Element:…………..Ca D. Element:…………..Ba
Physical state:……..solid Physical state:……..solid
Density:……………1.57 g/cm3 Density:……………3.6g/cm3
Melting Point:……...845oC Melting Point:……...710 oC
Reactivity:………….some Reactivity:…………. strong
Color:………………silvery white Color:………………silvery white
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